All: Use Lerna to manage monorepo

packages/lib/markupLanguageUtils.ts

@@ -0,0 +1,42 @@
+import markdownUtils from './markdownUtils';
+import Setting from './models/Setting';
+import shim from './shim';
+import MarkupToHtml, { MarkupLanguage } from '@joplinapp/renderer/MarkupToHtml';
+
+const htmlUtils = require('./htmlUtils');
+const Resource = require('./models/Resource');
+
+class MarkupLanguageUtils {
+	lib_(language:MarkupLanguage) {
+		if (language === MarkupLanguage.Html) return htmlUtils;
+		if (language === MarkupLanguage.Markdown) return markdownUtils;
+		throw new Error(`Unsupported markup language: ${language}`);
+	}
+
+	extractImageUrls(language:MarkupLanguage, text:string) {
+		return this.lib_(language).extractImageUrls(text);
+	}
+
+	// Create a new MarkupToHtml instance while injecting options specific to Joplin
+	// desktop and mobile applications.
+	newMarkupToHtml(options:any = null) {
+		const subValues = Setting.subValues('markdown.plugin', Setting.toPlainObject());
+		const pluginOptions:any = {};
+		for (const n in subValues) {
+			pluginOptions[n] = { enabled: subValues[n] };
+		}
+
+		options = Object.assign({
+			ResourceModel: Resource,
+			pluginOptions: pluginOptions,
+			tempDir: Setting.value('tempDir'),
+			fsDriver: shim.fsDriver(),
+		}, options);
+
+		return new MarkupToHtml(options);
+	}
+}
+
+const markupLanguageUtils = new MarkupLanguageUtils();
+
+export default markupLanguageUtils;